package com.itheima.properties;

import java.io.FileOutputStream;
import java.io.FileReader;
import java.util.Properties;

public class Demo04 {

    public static void main(String[] args) throws Exception{

        Properties properties = new Properties();
        properties.load(new FileReader("day13\\aaa\\system.properties"));
        properties.setProperty("maxlogincount","5");
        properties.store(new FileOutputStream("day13\\aaa\\system.properties"),"我也不知道该写啥");

    }
}
